BMW 1 series F20/F21 (2011-2015) computer data lines system Wiring diagrams

A/T AERIAL DIVERSITY (BOTTOM CENTER OF REAR WINDOW) ANTI-LOCK BRAKES SYSTEM BLK WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/BLK WIRE BLU/RED WIRE BLU/YEL WIRE BRAKE LIGHT SWITCH (UNDER LEFT SIDE OF DASH) BRN WIRE BRN/BLK WIRE BRN/GRY WIRE CAR ACCESS SYSTEM (UNDER LEFT SIDE OF DASH) CLUTCH SWITCH MODULE (UNDER LEFT SIDE OF DASH) COMPUTER DATA LINES SYSTEM COUPE CONVERTIBLE DC/DC CONVERTER DME CONTROL MODULE (RIGHT REAR OF ENGINE COMPT) ELECTRIC STEERING LOCK ELECTROCHROMIC INTERIOR REAR VIEW MIRROR FBD RECEIVER FOOTWELL MODULE (UNDER LEFT SIDE OF DASH) FUSE GRN WIRE GRN/BRN WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/BRN WIRE HOOD CONTACT SWITCH (LEFT REAR OF ENGINE COMPT) HOT AT ALL TIMES HOT W/ BISTABLE RELAY ENERGIZED INTERLCK SENS GROUND TERM 15 SIG TERM 15 SIG JUNCTION BOX (UNDER RIGHT SIDE OF DASH) JUNCTION BOX ELECTRONICS M/T MULTIPLE RESTRAINT SYSTEM CONTROL UNIT NCA WIRE ORG/GRN WIRE RED WIRE RED/BLU WIRE RED/YEL WIRE RELAY REMOTE CONTROL RECEIVER SEAT OCCUPANCY RECOGNITION STARTING/CHARGING SYSTEM SUPPLEMENTAL RESTRAINTS SYSTEM TCU TELE SIG LID CONTACT REAR LID SIG TERM 30 TERM 50 SIG ELEC STR + ELEC STR - GROUND CAN BUS TERM R SIG TERM R SIG TERM R TERM R SIG TERM 50 TERM 15 SIG TERM 15 SIG TERMINAL TERMINAL 15 RELAY TRANS SIG TRANSMISSION CONTROL MODULE TRANSMISSIONS SYSTEM TRUNK, TAILGATE, FUEL DOORS SYSTEM VIO/BLU WIRE VIO/GRN WIRE VIO/RED WIRE VIO/WHT WIRE VIO/YEL WIRE WAKE-UP WHT WIRE YEL WIRE YEL/BLU WIRE YEL/RED WIRE

BLU/GRY WIRE BLU/YEL WIRE BRN WIRE CAR ACCESS SYSTEM (UNDER LEFT SIDE OF DASH) COMFORT ACCESS CONTROL MODULE (RIGHT SIDE OF REAR COMPT) COMPUTER DATA LINES SYSTEM COUPE DRIVER'S SIDE OUTER DOOR HANDLE ELECTRONIC MODULE FRONT INNER ANTENNA CENTER CONSOLE GRN WIRE GRY WIRE GRY/GRN WIRE GRY/VIO WIRE GRY/WHT WIRE GRY/YEL WIRE ORG/GRN WIRE PASSENGER'S SIDE OUTER DOOR HANDLE ELECTRONIC MODULE REAR BUMPER AERIAL REAR INNER ANTENNA LUGGAGE COMPARTMENT REAR INTERIOR ANTENNA CENTER CONSOLE RED WIRE RED/YEL WIRE SLIDE-IN COMPARTMENT START-STOP BUTTON WHT WIRE WHT/BLK WIRE WHT/GRN WIRE

ACTIVE STEERING (BEHIND LEFT FRONT WHEEL) BLK/RED/WHT WIRE BLK/VIO WIRE BLK/YEL WIRE BLU WIRE BLU/ WHT WIRE BLU/BRN/YEL WIRE BLU/RED WIRE BLU/VIO WIRE BLU/WHT/YEL WIRE BRAKE FLUID LEVEL SWITCH (LEFT REAR OF ENGINE COMPT) BRAKE LIGHT SWITCH (UNDER LEFT SIDE OF DASH) BRK FLD LVL BRK LIGHT LF BRK PAD BRN WIRE BRN/BLK WIRE BRN/GRN/YEL WIRE BRN/RED WIRE CAR ACCESS SYSTEM (UNDER LEFT SIDE OF DASH) COMPUTER DATA LINES SYSTEM COND WHL SPD F-CAN-LOW DSC SENS DME CONTROL MODULE (RIGHT REAR OF ENGINE COMPT) DSC SENSOR (UNDER DRIVER'S SEAT) DSC SENSOR 2 DYNAMIC STABILITY CONTROL (DSC) (LEFT REAR OF ENGINE COMPT) ELECTRONICS JUNCTION BOX F-CAN HIGH RF WHL OUT FUSE GRN/RED WIRE HAZARD WARNING SWITCH HOT AT ALL TIMES HOT W/ TERMINAL JUNCTION BOX (UNDER RIGHT SIDE OF DASH) LEFT FRONT WHEEL SPEED SENSOR (FRONT OF LEFT FRONT WHEEL) LEFT REAR WHEEL SPEED SENSOR (BEHIND LEFT REAR WHEEL) LF WHL OUT PT CAN LOW GROUND LF WHL SPD LF WHL SPD GROUND LR WHL SPD LR WHL SPD PARKING BRK DSC SENS RR BRK PAD NCA WIRE PARKING BRAKE WARNING SWITCH (UNDER CENTER CONSOLE) RED WIRE RED/BLK WIRE RED/BLU WIRE RED/GRY WIRE RED/YEL WIRE RIGHT FRONT WHEEL SPEED SENSOR (FRONT OF RIGHT FRONT WHEEL) RIGHT REAR WHEEL SPEED SENSOR (BEHIND RIGHT REAR WHEEL) RR BRK PAD RR WHL OUT RF BRK PAD RR WHL SPD RR WHL SPD STEERING COLUMN SWITCH CLUSTER TELEPHONE TRANSCEIVER (CENTER OF REAR COMPT) TERMINAL 30 RF WHL SPD RF WHL SPD VIO WIRE VIO/WHT WIRE W/ NAVIGATION (NOT USED) W/O NAVIGATION WAKE UP PT CAN HIGH WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/YEL WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/BRN WIRE YEL/RED WIRE YEL/VIO WIRE YEL/WHT WIRE

13 24 42 46 DR CONTACT SIG 29 40 39 38 35 26 33 CENTER SIG AERIAL DIVERSITY (BOTTOM CENTER OF REAR WINDOW) BLK WIRE BLK/BLU WIRE BLU WIRE BLU/RED WIRE BRN WIRE BRN/BLK WIRE BRN/GRY/WHT WIRE BRN/GRY/YEL WIRE BRN/WHT WIRE CAR ACCESS SYSTEM (UNDER LEFT SIDE OF DASH) COMPUTER DATA LINES SYSTEM COUPE DRIVER'S DOOR SYSTEM LOCK (LEFT FRONT DOOR) ELECTROCHROMIC INTERIOR REAR VIEW MIRROR FBD RECEIVER FOOTWELL MODULE (UNDER LEFT SIDE OF DASH) FUSE GRN WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/RED WIRE GRY/YEL WIRE HAZARD WARNING SWITCH HOOD CONTACT SWITCH (LEFT REAR OF ENGINE COMPT) HOT AT ALL TIMES HOTEL SWITCH JUNCTION BOX (UNDER RIGHT SIDE OF DASH) JUNCTION BOX ELECTRONICS LOCKING LOCK SIG UNLOCKING LCK SIG 45 46 K-BUS SIG K-BUS SIG ORG/GRN WIRE REAR LID SIG LID CONTACT CAN BUS CAN BUS RMTE CNTRL SIG REMOTE CONTROL RECEIVER TRUNK LID BUTTON VIO/GRN WIRE WHT WIRE WHT/BLK WIRE YEL/BLU WIRE YEL/BRN WIRE YEL/RED WIRE

BLK WIRE BLK/RED WIRE BLU WIRE BRN WIRE BRN/BLK WIRE BRN/GRY WIRE BRN/GRY/YEL WIRE COMPUTER DATA LINES SYSTEM COUPE CONVERTIBLE FUEL FILLER FLAP CENTRAL LOCKING DRIVE (RIGHT SIDE OF REAR COMPT) GRN WIRE GRY/BLK WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/RED WIRE HOT AT ALL TIMES FUSE INTERIOR REAR LID RELEASE SWITCH JUNCTION BOX (UNDER RIGHT SIDE OF DASH) ODDMENTS COMPARTMENT CENTRAL LOCKING DRIVE (CONVERTIBLE) ORG/GRN WIRE PASSENGER'S DOOR SYSTEM LOCK RED/BLK WIRE RED/BRN WIRE WHT WIRE

ANTI- THEFT ALARM LED BLK/RED WIRE BRN WIRE COMPUTER DATA LINES SYSTEM COUPE DRIVER'S DOOR MICROWAVE SENSOR ELECTROCHROMIC INTERIOR REAR VIEW MIRROR GRN WIRE GRY/BLK WIRE GRY/BRN WIRE GRY/GRN WIRE HOT AT ALL TIMES FUSE JUNCTION BOX (UNDER RIGHT SIDE OF DASH) ORG/GRN WIRE PASSENGER'S DOOR MICROWAVE SENSOR POWER DISTRIBUTION SYSTEM RED/BLK WIRE RED/BRN WIRE RED/GRN WIRE RED/VIO WIRE RIGHT REAR MICROWAVE SENSOR TRUNK LID CENTRAL LOCKING DRIVE (ON REAR COMPARTMENT LID) WHT/BRN WIRE

1 2 3 4 5 6 7 8 9 10 11 12 GND 1 2 3 4 5 6 7 8 9 10 11 12 GND CAN BUS SIG CAN BUS SIG 1 2 3 4 5 6 7 8 LIN BUS SIG STEPPER GND STEPPER SPLY SENS SIG 9 10 11 12 SENS GND AUC SENSOR (RIGHT REAR OF ENGINE COMPT) AUXILIARY WATER PUMP (LEFT REAR OF ENGINE COMPT) BLK WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/YEL WIRE BLOWER MOTOR (ON HVAC UNIT) BLOWER OUTPUT STAGE BLOWER SIG SENS GND BLU WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/BLK WIRE BRN/RED WIRE CENTER CONSOLE SWITCH CENTER COMPUTER DATA LINES SYSTEM CONDENSATION SENSOR (CENTER OF WINDSHIELD) CONVERTIBLE TOP MODULE (BEHIND LEFT REAR SEAT) COOLANT PRESSURE SENSOR (RIGHT FRONT OF ENGINE COMPT) ELECTRONICS JUNCTION BOX EVAPORATOR TEMPERATURE SENSOR (ON HVAC UNIT) FUSE 6 FUSE 77 FUSE 88 GRN WIRE GRN/RED WIRE HEATING/AIR CONDITIONING SYSTEM (CENTER OF DASH, ABOVE RADIO) HOT AT ALL TIMES HOT W/ HOT W/ TERMINAL 15 RELAY ENERGIZED JUNCTION BOX (UNDER RIGHT SIDE OF DASH) MIXING AIR CONTROL NCA WIRE ORG/GRN WIRE RED WIRE RED/GRY WIRE RED/VIO WIRE RED/YEL WIRE REFRIGERANT COMPRESSOR CONTROL VALVE RELAY ENERGIZED ROOF FUNCTION CONTROL CENTER SENS SIG SENS SIG SENS SIG SENS SPLY SOLAR SENSOR (TOP CENTER OF DASH) SW CENTER SIG SW CENTER SIG VENTILATION TEMPERATURE SENSOR (ON HVAC UNIT) WATER VALVE (LEFT SIDE OF AUXILIARY WATER PUMP) WHT WIRE WHT/BRN WIRE WHT/GRY WIRE YEL WIRE YEL/BLK WIRE YEL/BRN WIRE YEL/RED WIRE

41 13 15 55 SENS GND SIG 7 8 20 CAN LOW CAN HI ACTIVATION ACTIVATION AIR DISTRIBUTION FLAP MOTOR (ON HVAC UNIT) BLK/BLU WIRE BLK/VIO WIRE BLU WIRE BLU/RED WIRE BRN WIRE CHARACTERISTIC MAP THERMOSTAT (REAR OF ENGINE) COMPUTER DATA LINES SYSTEM DEFROSTER FLAP MOTOR (ON HVAC UNIT) DME CONTROL MODULE (RIGHT REAR OF ELECTRIC COOLANT PUMP (REAR OF ENGINE) ELECTRIC FAN (FRONT OF ENGINE COMPT) ELECTRIC FAN CUT OUT RELAY ENGINE COMPT) ENGINE COOLANT TEMPERATURE SENSOR FOOTWELL FLAP MOTOR (ON HVAC UNIT) FRESH AIR/RECIRCULATED AIR FLAP MOTOR (ON HVAC UNIT) FUSE GRN WIRE HOT AT ALL TIMES HOT W/ TERMINAL JUNCTION BOX (UNDER RIGHT SIDE OF DASH) LEFT MIXED AIR FLAP MOTOR (ON HVAC UNIT) MIXER FLAP MOTOR (ON HVAC UNIT) ORG/ WIRE RED WIRE RED/BLU WIRE RED/GRN WIRE RIGHT MIXED AIR FLAP MOTOR (ON HVAC UNIT) SENS SIG VENTILATION FLAP MOTOR (ON HVAC UNIT) VIO WIRE WHT WIRE YEL/RED WIRE

BLK WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/RED WIRE BLU/YEL WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM EXTERIOR LIGHTS SYSTEM HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM FOOTWELL MODULE (UNDER LEFT SIDE OF DASH) FUSE 84 GRN WIRE GRN/BLK WIRE GRN/RED WIRE GRN/YEL WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/RED WIRE GRY/VIO WIRE GRY/WHT WIRE GRY/YEL WIRE HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM HEADLIGHTS SYSTEM HOT AT ALL TIMES JUNCTION BOX (UNDER RIGHT SIDE OF DASH) MEMORY SYSTEMS POWER WINDOWS SYSTEM ORG/GRN WIRE RED WIRE RED/BLU WIRE RED/GRN WIRE WHT WIRE WHT/BLU WIRE WHT/BRN WIRE WHT/RED WIRE WHT/YEL WIRE YEL WIRE YEL/BLK WIRE YEL/BRN WIRE YEL/GRN WIRE YEL/RED WIRE YEL/WHT WIRE

41 13 15 55 SENS GND SIG 7 8 20 CAN LOW CAN HI ACTIVATION ACTIVATION BLK/BLU WIRE BLK/VIO WIRE BLU/RED WIRE BRN WIRE CHARACTERISTIC MAP THERMOSTAT (REAR OF ENGINE) COMPUTER DATA LINES SYSTEM DME CONTROL MODULE (RIGHT REAR OF ELECTRIC COOLANT PUMP (REAR OF ENGINE) ELECTRIC FAN (FRONT OF ENGINE COMPT) ELECTRIC FAN CUT OUT RELAY ENGINE COMPT) ENGINE COOLANT TEMPERATURE SENSOR FUSE FUSE RIGHT SIDE OF DASH) HOT AT ALL TIMES HOT W/ TERMINAL JUNCTION BOX (UNDER ORG/ WIRE RED WIRE RED/BLU WIRE RED/GRN WIRE SENS SIG VIO WIRE WHT WIRE YEL/RED WIRE